CALIBRATION METHOD OF SONIC SPEED FOR TEST DEVICE

The present invention relates to a method of adjusting a sound speed of a quality inspection device for an internal welding part of a water pipe, and more specifically to the method of adjusting a sound speed of a quality inspection device for an internal welding part of a water pipe capable of performing accurate defect inspection by adjusting the sound speed differently at an interface between a lining and a pipe in a process of inspecting internal defects in water pipes equipped with cement lining. According to the present invention, the convenience of inspection of internal welding parts is improved, making it possible to easily inspect the quality of internal welding parts of water pipes. By using ultrasonic waves, highly reliable quality inspection on internal welding parts of water pipes can be implemented in a non-destructive manner. The method of adjusting a sound speed of a quality inspection device for an internal welding part of a water pipe may include a step of starting inspection of a pipe (11) installed in a water pipe (10) with a quality inspection device (100) fixed to an external wall of the water pipe (10). 본 발명은 상수도관 내부용접부 품질검사장치의 음속조정 방법에 관한 것으로서, 보다 상세하게는 시멘트 라이닝이 구비된 상수도관의 내부 결함을 검사하는 과정에서 라이닝과 파이프의 경계면에서 음속을 다르게 조정하여 정확한 결함 검사가 가능하도록 하는 상수도관 내부용접부 품질검사장치의 음속조정 방법에 관한 것이다. 본 발명에 따르면 내부용접부에 대한 검사의 편의성이 향상되어 용이하게 상수도관 내부용접부에 대하여 품질검사가 가능해지며, 초음파를 이용하여 비파괴적인 방법으로 신뢰성 높은 상수도관 내부용접부에 대한 품질검사가 가능한 효과가 있다.